Update example

Author: devlights

examples/singleapp/utf8-byte-count/Taskfile.yml

@@ -5,7 +5,10 @@ version: '3'
 tasks:
   default:
     cmds:
-      - task: run
-  run:
+      - task: run-manual
+  run-manual:
     cmds:
       - go run main.go
+  run-userune:
+    cmds:
+      - go run main.go -u

examples/singleapp/utf8-byte-count/main.go

@@ -1,25 +1,52 @@
 package main
 
 import (
+	"flag"
 	"unicode/utf8"
 
 	"github.com/devlights/gomy/output"
 )
 
 func main() {
-	if err := run(); err != nil {
+	var (
+		u = flag.Bool("u", false, "use rune")
+	)
+
+	flag.Parse()
+	if err := run(*u); err != nil {
 		panic(err)
 	}
 }
 
-func run() error {
+func run(runeMode bool) error {
 	var (
-		s = "こんにちは コンニチハ ｺﾝﾆﾁﾜ hello"
+		strs = []string{
+			// 全角かな
+			"こんにちは",
+			// 全角カタカナ
+			"コンニチハ",
+			// 半角カタカナ
+			"ｺﾝﾆﾁﾜ",
+			// 英数字
+			"golang->60l4n6",
+			// ©¼½¾
+			"\U000000A9\U000000BC\U000000BD\U000000BE",
+			// 🍺🍻🍷🍜
+			"\U0001F37A\U0001F37B\U0001F377\U0001F35C",
+		}
+		fn = manual
 	)
 
-	manual(s)
-	output.StdoutHr()
-	userune(s)
+	if runeMode {
+		fn = userune
+		output.Stdoutl("[MODE]", "Use Rune")
+	}
+
+	for _, v := range strs {
+		output.Stdoutf("", "[%s]", v)
+		output.StdoutHr()
+		fn(v)
+	}
 
 	return nil
 }
@@ -28,41 +55,43 @@ func userune(s string) {
 	//lint:ignore S1029 It's ok because this is just a example.
 	//lint:ignore SA6003 It's ok because this is just a example.
 	for _, r := range []rune(s) {
-		l := utf8.RuneLen(r)
 
 		if r == rune(' ') {
 			output.StderrHr()
-		} else {
-			output.Stdoutl("[userune][byte-count]", l)
+			continue
 		}
+
+		output.Stdoutl("[byte-count]", utf8.RuneLen(r))
 	}
 }
 
 func manual(s string) {
 	for i := 0; i < len(s); {
-		c := s[i]
-
 		//
 		// UTF-8の先頭バイトを判定し、バイトサイズ算出
 		//
-		l := 0
+		var (
+			b = s[i]
+			l = 0
+		)
+
 		switch {
-		case (c & 0x80) == 0:
+		case (b & 0x80) == 0:
 			l = 1
-		case (c & 0xE0) == 0xC0:
+		case (b & 0xE0) == 0xC0:
 			l = 2
-		case (c & 0xF0) == 0xE0:
+		case (b & 0xF0) == 0xE0:
 			l = 3
-		case (c & 0xF8) == 0xF0:
+		case (b & 0xF8) == 0xF0:
 			l = 4
 		}
 
-		if c == ' ' {
+		i += l
+		if b == ' ' {
 			output.StdoutHr()
-		} else {
-			output.Stdoutl("[manual][byte-count]", l)
+			continue
 		}
 
-		i += l
+		output.Stdoutl("[byte-count]", l)
 	}
 }